Gourmet Cheese Potatoes

Preheat oven to 350 degrees F (175 degrees C).

Bring a large pot of salted water to a boil. Add potatoes and cook until tender but still firm about 15 minutes. Drain cool and chop.

Place potatoes and onions in a 9x13 inch casserole dish.

In a medium saucepan combine soup milk sour cream and processed cheese; heat until cheese is melted. Pour over potatoes. Dot with butter and covered with shredded cheese.

Bake in preheated oven for 1 hour.